
	Trending ▼ ICSE CBSE 10th ISC CBSE 12th CTET GATE UGC NET Vestibulares ResFinder

2003 Course Polymer Processing Operations - I

3 pages, 38 questions, 0 questions with responses, 0 total responses,

	pune_eng	+Fave Message
	Profile Timeline Uploads Q & A

Home > pune_eng >

Instantly get Model Answers to questions on this ResPaper. Try now!
NEW ResPaper Exclusive!

Formatting page ...

Total No. of Questions : 12] P1370 [Total No. of Pages : 3 [3764]- 352 B.E. (Polymer) POLYMER PROCESSING OPERATIONS - I (2003 Course) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answer any three questions for each section. 2) Answers to the two sections should be written in separate book. 3) Figures to the right indicate full marks. 4) Use of logarithmic tables, slide rule, mollier charts, electronic pocket calculator and steam table is allowed. 5) Assume suitable data, if necessary. SECTION - I Q1) a) Discuss the concept of barrier screw with suitable sketch. Discuss also merits and demerits of same. [8] b) Explain with neat sketch wire coating process. [8] c) Explain why capstan is used in wire coating. [2] OR Q2) a) Describe the different methods used for pipe size. [6] b) Explain the process of lamination and the effect of process parameter on quality of products. [6] c) Explain different types of winders with merits and demerits used in film production. [6] Q3) a) Draw neat sketch of accumulator type die head assembly for extrusion blow molding? Explain function of each part. [8] b) Explain the following terms with references to extrusion blow molding. i) ii) iii) iv) Parison sag. Pleating. Shark Skin effect. Calibrated neck. [8] OR P.T.O. Q4) a) Explain how will you control degree of crystallization and rule of crystallization in single as well as two stage PET injection stretch blow molding. [8] b) List different techniques of parison programming. Explain any one method with neat sketch. [8] Q5) a) Explain the significances of Biot number in case of thermoferming of thick and thin sheet. [6] b) Discuss the types of molds and mold material and design consideration for thermoferming mold. [6] c) Discuss different types of heating modes of thin sheet and thick sheet.[4] OR Q6) Write short notes on : [16] a) Draw ratio and secondary draw. b) Twin sheet roll fed thermoforming. c) Process control in thermoforming. d) Diaphragm forming. SECTION - II Q7) a) With neat sketch explain the process of gas injection molding. [6] b) Draw cycle time chart of thermoset injection molding clearly showing atleast one method of mold breathing. [6] c) Write short note on sandwich molding . [6] OR Q8) a) Explain the process of reaction injection molding? Give applications of process. [8] b) Explain the different sequences for pattern generation in injection molding. [6] c) Write short note on Structural foam injection molding. [3764]-352 -2- [4] Q9) a) Explain flow cure relationship for compression molding process. [4] b) Explain the effect of bulk factor and particle size distribution on compression molding product. [4] c) Draw a cycle time chart for compression molding process. [4] d) Explain the benefit of preheating the thermoset material prior to molding. [4] OR Q10) a) Discuss positive, semi positive and flash type of mold with merits and demerits of same. [9] b) Give mold features of compression molding of dough molding compound (D.M.C). [7] Q11) a) Explain dielectric preheating and infrared preheating in detail and give merits and demerits of same. [8] b) With neat sketch differentiate between Integral pot type and separate pot method of transfer molding. [8] OR Q12) a) Explain advantages of transfer molding over compression molding process. [4] b) With help of bar chart for molding cycle explain the process of transfer molding. [5] c) State any four defects in transfer molding and suggest remedy for it.[4] d) Explain the need for breathing in transfer molding process. xxxx [3764]-352 -3- [3]

Formatting page ...

Tags : Pune, Engineering, University of Pune, Engineering question papers, Pune University, previous year question papers, question papers, india, model question paper, pune university paper pattern, pune university syllabus, old question papers

pune_eng chat

Horizontal lines at:
Guest Horizontal lines at:
AutoRM Data:
Box geometries: